A rotary actuator has a rotatable platform rotatably supported on a base. The rotatable platform has a friction surface. An actuator band is operated by a band clamp so as to be selectively frictionally engageable with the friction surface. A motion actuator is coupled between the base and the actuator band such that change in length of the motion actuator causes corresponding movement of the actuator band. A brake band is operated by a brake band actuator so as to be selectively frictionally engageable with the friction surface, the brake band anchored to the base.

A solar tracker system comprising a plurality of on sun trackers and a plurality of off sun tracker. Each tracker is selectively adjusted to achieve a desired power output of the solar power plant system in an example.

A coupling system for use with a solar tracker includes a support flange, a swivel flange rotatably supported on the support flange, an articulation joint interposed between each of the support flange and the swivel flange and rotatably supported by each of the support flange and the swivel flange, wherein opposed first and second end portions of the articulation joint are configured to be operably coupled to a respective first and second torque tube, and at least one locking fastener selectively coupled to a portion of the support flange and a portion of the swivel flange, the at least one locking fastener configured to selectively inhibit rotation of the swivel flange relative to the support flange.

A solar tracker system comprising a plurality of on sun trackers and a plurality of off sun tracker. Each tracker is selectively adjusted to achieve a desired power output of the solar power plant system in an example.

A thin support structure for solar collectors is provided. The support structure includes service lines, such as fluid lines and electrical signal lines, disposed within an interior cavity of the support structure. The movement and flexing of the service lines is accounted for by a pulley assembly having a rotating element, without the need for complex and expensive swivel joints and slip rings.

In an example, the system has a mechanical isolator comprising an elastic material configured to separate the panel rail from the torque tube cause destructive interference with a natural resonant frequency of the system without the mechanical isolator to reduce a mechanical vibration of the system.

Described herein are improved solar tracker systems having variable profiles and related operating methods thereof. Solar-tracking PV systems with variable twisted or aerodynamic profiles offer several advantages including improved wind stability, improved shading characteristics and/or capability to correct system component misalignment. In an embodiment, motor drives (and locking devices if present) of a PV system can be driven against each other to cause a desirable twisted or aerodynamic profile of a torque tube and associated PV modules mounted on the torque tube. The desired twisted or aerodynamic profiles can range from a substantially flat horizontal plate to a twisted helix-like profile and combinations thereof so as to establish improved wind and/or shading characteristics. Advantages can also include a reduction in structural materials, increased structural strength, increased solar energy yield or a combination thereof.

A distributed torque, single axis solar tracking system includes a plurality of spaced apart mounting posts with selected posts having an electrically controlled actuator mounted thereon. A torque structure extends between the actuators to distribute rotational torque on the torque structure. A plurality of solar panels is connected to the torque structure. Electrical apparatus is coupled to each actuator and designed to be coupled to a power source so that when the electrical apparatus is coupled to the power source, the plurality of actuators is energized to rotate simultaneously a desired amount. Whereby the plurality of solar panels is rotated the desired amount as the plurality of actuators rotates.

In a first embodiment, the present invention is directed to an environment-adjusting, support system for solar energy devices wherein the support system comprises at least one vertical support element secured to a support surface, and at least one rotary element securing a solar energy device to said vertical support elements. The support system may further comprise at least one adjustable counterweight, a linear damper, and/or an energy damper. In a second embodiment, the present invention is an environment-adjusting, support system for solar energy devices. The support system preferably comprises a pair of vertical support elements, a pair of securing members, a first connecting element connecting the pair of vertical support elements, a second connecting element connecting the pair of securing members, and at least one rotary element. In a third embodiment, the present invention is an environment-adjusting, solar energy apparatus which also comprises a solar energy device.

A solar tracker system comprising a plurality of on sun trackers and a plurality of off sun tracker. Each tracker is selectively adjusted to achieve a desired power output of the solar power plant system in an example.